… | |
… | |
116 | unsigned header_length; /* size of aio_ring */ |
116 | unsigned header_length; /* size of aio_ring */ |
117 | |
117 | |
118 | struct io_event io_events[0]; |
118 | struct io_event io_events[0]; |
119 | }; |
119 | }; |
120 | |
120 | |
121 | /* |
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122 | * define some syscall wrappers for common architectures |
|
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123 | * this is mostly for nice looks during debugging, not performance. |
|
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124 | * our syscalls return < 0, not == -1, on error. which is good |
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125 | * enough for linux aio. |
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126 | * TODO: arm is also common nowadays, maybe even mips and x86 |
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127 | * TODO: after implementing this, it suddenly looks like overkill, but its hard to remove... |
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128 | */ |
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129 | #if __GNUC__ && __linux && ECB_AMD64 && !defined __OPTIMIZE_SIZE__ |
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130 | /* the costly errno access probably kills this for size optimisation */ |
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131 | |
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132 | #define ev_syscall(nr,narg,arg1,arg2,arg3,arg4,arg5) \ |
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133 | ({ \ |
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134 | long res; \ |
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135 | register unsigned long r5 __asm__ ("r8" ); \ |
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136 | register unsigned long r4 __asm__ ("r10"); \ |
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137 | register unsigned long r3 __asm__ ("rdx"); \ |
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138 | register unsigned long r2 __asm__ ("rsi"); \ |
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139 | register unsigned long r1 __asm__ ("rdi"); \ |
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140 | if (narg >= 5) r5 = (unsigned long)(arg5); \ |
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141 | if (narg >= 4) r4 = (unsigned long)(arg4); \ |
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142 | if (narg >= 3) r3 = (unsigned long)(arg3); \ |
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143 | if (narg >= 2) r2 = (unsigned long)(arg2); \ |
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144 | if (narg >= 1) r1 = (unsigned long)(arg1); \ |
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145 | __asm__ __volatile__ ( \ |
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146 | "syscall\n\t" \ |
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147 | : "=a" (res) \ |
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148 | : "0" (nr), "r" (r1), "r" (r2), "r" (r3), "r" (r4), "r" (r5) \ |
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149 | : "cc", "r11", "cx", "memory"); \ |
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150 | errno = -res; \ |
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151 | res; \ |
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152 | }) |
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153 | |
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154 | #endif |
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155 | |
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156 | #ifdef ev_syscall |
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157 | #define ev_syscall0(nr) ev_syscall (nr, 0, 0, 0, 0, 0, 0 |
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158 | #define ev_syscall1(nr,arg1) ev_syscall (nr, 1, arg1, 0, 0, 0, 0) |
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159 | #define ev_syscall2(nr,arg1,arg2) ev_syscall (nr, 2, arg1, arg2, 0, 0, 0) |
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160 | #define ev_syscall3(nr,arg1,arg2,arg3) ev_syscall (nr, 3, arg1, arg2, arg3, 0, 0) |
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161 | #define ev_syscall4(nr,arg1,arg2,arg3,arg4) ev_syscall (nr, 3, arg1, arg2, arg3, arg4, 0) |
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162 | #define ev_syscall5(nr,arg1,arg2,arg3,arg4,arg5) ev_syscall (nr, 5, arg1, arg2, arg3, arg4, arg5) |
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163 | #else |
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164 | #define ev_syscall0(nr) syscall (nr) |
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165 | #define ev_syscall1(nr,arg1) syscall (nr, arg1) |
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166 | #define ev_syscall2(nr,arg1,arg2) syscall (nr, arg1, arg2) |
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167 | #define ev_syscall3(nr,arg1,arg2,arg3) syscall (nr, arg1, arg2, arg3) |
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168 | #define ev_syscall4(nr,arg1,arg2,arg3,arg4) syscall (nr, arg1, arg2, arg3, arg4) |
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169 | #define ev_syscall5(nr,arg1,arg2,arg3,arg4,arg5) syscall (nr, arg1, arg2, arg3, arg4, arg5) |
|
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170 | #endif |
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171 | |
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172 | inline_size |
121 | inline_size |
173 | int |
122 | int |
174 | evsys_io_setup (unsigned nr_events, aio_context_t *ctx_idp) |
123 | evsys_io_setup (unsigned nr_events, aio_context_t *ctx_idp) |
175 | { |
124 | { |
176 | return ev_syscall2 (SYS_io_setup, nr_events, ctx_idp); |
125 | return ev_syscall2 (SYS_io_setup, nr_events, ctx_idp); |
… | |
… | |
263 | * this is not well documented, so we better do it. |
212 | * this is not well documented, so we better do it. |
264 | */ |
213 | */ |
265 | memset (iocb, 0, sizeof (*iocb)); |
214 | memset (iocb, 0, sizeof (*iocb)); |
266 | |
215 | |
267 | iocb->io.aio_lio_opcode = IOCB_CMD_POLL; |
216 | iocb->io.aio_lio_opcode = IOCB_CMD_POLL; |
268 | iocb->io.aio_data = offset; |
|
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269 | iocb->io.aio_fildes = offset; |
217 | iocb->io.aio_fildes = offset; |
270 | |
218 | |
271 | base [offset++] = iocb; |
219 | base [offset++] = iocb; |
272 | } |
220 | } |
273 | } |
221 | } |
… | |
… | |
285 | static void |
233 | static void |
286 | linuxaio_modify (EV_P_ int fd, int oev, int nev) |
234 | linuxaio_modify (EV_P_ int fd, int oev, int nev) |
287 | { |
235 | { |
288 | array_needsize (ANIOCBP, linuxaio_iocbps, linuxaio_iocbpmax, fd + 1, linuxaio_array_needsize_iocbp); |
236 | array_needsize (ANIOCBP, linuxaio_iocbps, linuxaio_iocbpmax, fd + 1, linuxaio_array_needsize_iocbp); |
289 | ANIOCBP iocb = linuxaio_iocbps [fd]; |
237 | ANIOCBP iocb = linuxaio_iocbps [fd]; |
|
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238 | ANFD *anfd = &anfds [fd]; |
290 | |
239 | |
291 | if (iocb->io.aio_reqprio < 0) |
240 | if (ecb_expect_false (iocb->io.aio_reqprio < 0)) |
292 | { |
241 | { |
293 | /* we handed this fd over to epoll, so undo this first */ |
242 | /* we handed this fd over to epoll, so undo this first */ |
294 | /* we do it manually because the optimisations on epoll_modify won't do us any good */ |
243 | /* we do it manually because the optimisations on epoll_modify won't do us any good */ |
295 | epoll_ctl (backend_fd, EPOLL_CTL_DEL, fd, 0); |
244 | epoll_ctl (backend_fd, EPOLL_CTL_DEL, fd, 0); |
296 | anfds [fd].emask = 0; |
245 | anfd->emask = 0; |
297 | iocb->io.aio_reqprio = 0; |
246 | iocb->io.aio_reqprio = 0; |
298 | } |
247 | } |
299 | |
248 | else if (ecb_expect_false (iocb->io.aio_buf)) |
300 | if (iocb->io.aio_buf) |
|
|
301 | { |
249 | { |
|
|
250 | /* iocb active, so cancel it first before resubmit */ |
|
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251 | /* this assumes we only ever get one call per fd per loop iteration */ |
302 | for (;;) |
252 | for (;;) |
303 | { |
253 | { |
304 | /* on all relevant kernels, io_cancel fails with EINPROGRESS on "success" */ |
254 | /* on all relevant kernels, io_cancel fails with EINPROGRESS on "success" */ |
305 | if (expect_false (evsys_io_cancel (linuxaio_ctx, &iocb->io, (struct io_event *)0) == 09) |
255 | if (ecb_expect_false (evsys_io_cancel (linuxaio_ctx, &iocb->io, (struct io_event *)0) == 0)) |
306 | break; |
256 | break; |
307 | |
257 | |
308 | if (expect_true (errno == EINPROGRESS)) |
258 | if (ecb_expect_true (errno == EINPROGRESS)) |
309 | break; |
259 | break; |
310 | |
260 | |
311 | /* the EINPROGRESS test is for nicer error message. clumsy. */ |
261 | /* the EINPROGRESS test is for nicer error message. clumsy. */ |
|
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262 | if (errno != EINTR) |
|
|
263 | { |
312 | assert (("libev: linuxaio unexpected io_cancel failed", errno != EINPROGRESS && errno != EINTR)); |
264 | assert (("libev: linuxaio unexpected io_cancel failed", errno != EINTR && errno != EINPROGRESS)); |
|
|
265 | break; |
|
|
266 | } |
313 | } |
267 | } |
|
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268 | |
|
|
269 | /* increment generation counter to avoid handling old events */ |
|
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270 | ++anfd->egen; |
314 | } |
271 | } |
|
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272 | |
|
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273 | iocb->io.aio_buf = |
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274 | (nev & EV_READ ? POLLIN : 0) |
|
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275 | | (nev & EV_WRITE ? POLLOUT : 0); |
315 | |
276 | |
316 | if (nev) |
277 | if (nev) |
317 | { |
278 | { |
318 | iocb->io.aio_buf = |
279 | iocb->io.aio_data = (uint32_t)fd | ((__u64)(uint32_t)anfd->egen << 32); |
319 | (nev & EV_READ ? POLLIN : 0) |
|
|
320 | | (nev & EV_WRITE ? POLLOUT : 0); |
|
|
321 | |
280 | |
322 | /* queue iocb up for io_submit */ |
281 | /* queue iocb up for io_submit */ |
323 | /* this assumes we only ever get one call per fd per loop iteration */ |
282 | /* this assumes we only ever get one call per fd per loop iteration */ |
324 | ++linuxaio_submitcnt; |
283 | ++linuxaio_submitcnt; |
325 | array_needsize (struct iocb *, linuxaio_submits, linuxaio_submitmax, linuxaio_submitcnt, array_needsize_noinit); |
284 | array_needsize (struct iocb *, linuxaio_submits, linuxaio_submitmax, linuxaio_submitcnt, array_needsize_noinit); |
… | |
… | |
345 | static void |
304 | static void |
346 | linuxaio_parse_events (EV_P_ struct io_event *ev, int nr) |
305 | linuxaio_parse_events (EV_P_ struct io_event *ev, int nr) |
347 | { |
306 | { |
348 | while (nr) |
307 | while (nr) |
349 | { |
308 | { |
350 | int fd = ev->data; |
309 | int fd = ev->data & 0xffffffff; |
|
|
310 | uint32_t gen = ev->data >> 32; |
351 | int res = ev->res; |
311 | int res = ev->res; |
352 | |
312 | |
353 | assert (("libev: iocb fd must be in-bounds", fd >= 0 && fd < anfdmax)); |
313 | assert (("libev: iocb fd must be in-bounds", fd >= 0 && fd < anfdmax)); |
|
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314 | |
|
|
315 | /* ignore event if generation doesn't match */ |
|
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316 | if (ecb_expect_false (gen != (uint32_t)anfds [fd].egen)) |
|
|
317 | continue; |
354 | |
318 | |
355 | /* feed events, we do not expect or handle POLLNVAL */ |
319 | /* feed events, we do not expect or handle POLLNVAL */ |
356 | fd_event ( |
320 | fd_event ( |
357 | EV_A_ |
321 | EV_A_ |
358 | fd, |
322 | fd, |
… | |
… | |
371 | /* get any events from ring buffer, return true if any were handled */ |
335 | /* get any events from ring buffer, return true if any were handled */ |
372 | static int |
336 | static int |
373 | linuxaio_get_events_from_ring (EV_P) |
337 | linuxaio_get_events_from_ring (EV_P) |
374 | { |
338 | { |
375 | struct aio_ring *ring = (struct aio_ring *)linuxaio_ctx; |
339 | struct aio_ring *ring = (struct aio_ring *)linuxaio_ctx; |
|
|
340 | unsigned head, tail; |
376 | |
341 | |
377 | /* the kernel reads and writes both of these variables, */ |
342 | /* the kernel reads and writes both of these variables, */ |
378 | /* as a C extension, we assume that volatile use here */ |
343 | /* as a C extension, we assume that volatile use here */ |
379 | /* both makes reads atomic and once-only */ |
344 | /* both makes reads atomic and once-only */ |
380 | unsigned head = *(volatile unsigned *)&ring->head; |
345 | head = *(volatile unsigned *)&ring->head; |
|
|
346 | ECB_MEMORY_FENCE_ACQUIRE; |
381 | unsigned tail = *(volatile unsigned *)&ring->tail; |
347 | tail = *(volatile unsigned *)&ring->tail; |
382 | |
348 | |
383 | if (head == tail) |
349 | if (head == tail) |
384 | return 0; |
350 | return 0; |
385 | |
351 | |
386 | /* make sure the events up to tail are visible */ |
|
|
387 | ECB_MEMORY_FENCE_ACQUIRE; |
|
|
388 | |
|
|
389 | /* parse all available events, but only once, to avoid starvation */ |
352 | /* parse all available events, but only once, to avoid starvation */ |
390 | if (tail > head) /* normal case around */ |
353 | if (ecb_expect_true (tail > head)) /* normal case around */ |
391 | linuxaio_parse_events (EV_A_ ring->io_events + head, tail - head); |
354 | linuxaio_parse_events (EV_A_ ring->io_events + head, tail - head); |
392 | else /* wrapped around */ |
355 | else /* wrapped around */ |
393 | { |
356 | { |
394 | linuxaio_parse_events (EV_A_ ring->io_events + head, ring->nr - head); |
357 | linuxaio_parse_events (EV_A_ ring->io_events + head, ring->nr - head); |
395 | linuxaio_parse_events (EV_A_ ring->io_events, tail); |
358 | linuxaio_parse_events (EV_A_ ring->io_events, tail); |
… | |
… | |
406 | int |
369 | int |
407 | linuxaio_ringbuf_valid (EV_P) |
370 | linuxaio_ringbuf_valid (EV_P) |
408 | { |
371 | { |
409 | struct aio_ring *ring = (struct aio_ring *)linuxaio_ctx; |
372 | struct aio_ring *ring = (struct aio_ring *)linuxaio_ctx; |
410 | |
373 | |
411 | return expect_true (ring->magic == AIO_RING_MAGIC) |
374 | return ecb_expect_true (ring->magic == AIO_RING_MAGIC) |
412 | && ring->incompat_features == EV_AIO_RING_INCOMPAT_FEATURES |
375 | && ring->incompat_features == EV_AIO_RING_INCOMPAT_FEATURES |
413 | && ring->header_length == sizeof (struct aio_ring); /* TODO: or use it to find io_event[0]? */ |
376 | && ring->header_length == sizeof (struct aio_ring); /* TODO: or use it to find io_event[0]? */ |
414 | } |
377 | } |
415 | |
378 | |
416 | /* read at least one event from kernel, or timeout */ |
379 | /* read at least one event from kernel, or timeout */ |
… | |
… | |
421 | struct timespec ts; |
384 | struct timespec ts; |
422 | struct io_event ioev[8]; /* 256 octet stack space */ |
385 | struct io_event ioev[8]; /* 256 octet stack space */ |
423 | int want = 1; /* how many events to request */ |
386 | int want = 1; /* how many events to request */ |
424 | int ringbuf_valid = linuxaio_ringbuf_valid (EV_A); |
387 | int ringbuf_valid = linuxaio_ringbuf_valid (EV_A); |
425 | |
388 | |
426 | if (expect_true (ringbuf_valid)) |
389 | if (ecb_expect_true (ringbuf_valid)) |
427 | { |
390 | { |
428 | /* if the ring buffer has any events, we don't wait or call the kernel at all */ |
391 | /* if the ring buffer has any events, we don't wait or call the kernel at all */ |
429 | if (linuxaio_get_events_from_ring (EV_A)) |
392 | if (linuxaio_get_events_from_ring (EV_A)) |
430 | return; |
393 | return; |
431 | |
394 | |
… | |
… | |
444 | { |
407 | { |
445 | int res; |
408 | int res; |
446 | |
409 | |
447 | EV_RELEASE_CB; |
410 | EV_RELEASE_CB; |
448 | |
411 | |
449 | ts.tv_sec = (long)timeout; |
412 | EV_TS_SET (ts, timeout); |
450 | ts.tv_nsec = (long)((timeout - ts.tv_sec) * 1e9); |
|
|
451 | |
|
|
452 | res = evsys_io_getevents (linuxaio_ctx, 1, want, ioev, &ts); |
413 | res = evsys_io_getevents (linuxaio_ctx, 1, want, ioev, &ts); |
453 | |
414 | |
454 | EV_ACQUIRE_CB; |
415 | EV_ACQUIRE_CB; |
455 | |
416 | |
456 | if (res < 0) |
417 | if (res < 0) |
… | |
… | |
461 | else if (res) |
422 | else if (res) |
462 | { |
423 | { |
463 | /* at least one event available, handle them */ |
424 | /* at least one event available, handle them */ |
464 | linuxaio_parse_events (EV_A_ ioev, res); |
425 | linuxaio_parse_events (EV_A_ ioev, res); |
465 | |
426 | |
466 | if (expect_true (ringbuf_valid)) |
427 | if (ecb_expect_true (ringbuf_valid)) |
467 | { |
428 | { |
468 | /* if we have a ring buffer, handle any remaining events in it */ |
429 | /* if we have a ring buffer, handle any remaining events in it */ |
469 | linuxaio_get_events_from_ring (EV_A); |
430 | linuxaio_get_events_from_ring (EV_A); |
470 | |
431 | |
471 | /* at this point, we should have handled all outstanding events */ |
432 | /* at this point, we should have handled all outstanding events */ |
… | |
… | |
502 | /* which allows us to pinpoint the erroneous iocb */ |
463 | /* which allows us to pinpoint the erroneous iocb */ |
503 | for (submitted = 0; submitted < linuxaio_submitcnt; ) |
464 | for (submitted = 0; submitted < linuxaio_submitcnt; ) |
504 | { |
465 | { |
505 | int res = evsys_io_submit (linuxaio_ctx, linuxaio_submitcnt - submitted, linuxaio_submits + submitted); |
466 | int res = evsys_io_submit (linuxaio_ctx, linuxaio_submitcnt - submitted, linuxaio_submits + submitted); |
506 | |
467 | |
507 | if (expect_false (res < 0)) |
468 | if (ecb_expect_false (res < 0)) |
508 | if (errno == EINVAL) |
469 | if (errno == EINVAL) |
509 | { |
470 | { |
510 | /* This happens for unsupported fds, officially, but in my testing, |
471 | /* This happens for unsupported fds, officially, but in my testing, |
511 | * also randomly happens for supported fds. We fall back to good old |
472 | * also randomly happens for supported fds. We fall back to good old |
512 | * poll() here, under the assumption that this is a very rare case. |
473 | * poll() here, under the assumption that this is a very rare case. |
… | |
… | |
542 | } |
503 | } |
543 | |
504 | |
544 | ++linuxaio_iteration; |
505 | ++linuxaio_iteration; |
545 | if (linuxaio_io_setup (EV_A) < 0) |
506 | if (linuxaio_io_setup (EV_A) < 0) |
546 | { |
507 | { |
|
|
508 | /* TODO: rearm all and recreate epoll backend from scratch */ |
|
|
509 | /* TODO: might be more prudent? */ |
|
|
510 | |
547 | /* to bad, we can't get a new aio context, go 100% epoll */ |
511 | /* to bad, we can't get a new aio context, go 100% epoll */ |
548 | linuxaio_free_iocbp (EV_A); |
512 | linuxaio_free_iocbp (EV_A); |
549 | ev_io_stop (EV_A_ &linuxaio_epoll_w); |
513 | ev_io_stop (EV_A_ &linuxaio_epoll_w); |
550 | ev_ref (EV_A); |
514 | ev_ref (EV_A); |
551 | linuxaio_ctx = 0; |
515 | linuxaio_ctx = 0; |
|
|
516 | |
|
|
517 | backend = EVBACKEND_EPOLL; |
552 | backend_modify = epoll_modify; |
518 | backend_modify = epoll_modify; |
553 | backend_poll = epoll_poll; |
519 | backend_poll = epoll_poll; |
554 | } |
520 | } |
555 | |
521 | |
556 | timeout = 0; |
522 | timeout = 0; |
… | |
… | |
565 | res = 1; /* skip this iocb */ |
531 | res = 1; /* skip this iocb */ |
566 | } |
532 | } |
567 | else if (errno == EINTR) /* not seen in reality, not documented */ |
533 | else if (errno == EINTR) /* not seen in reality, not documented */ |
568 | res = 0; /* silently ignore and retry */ |
534 | res = 0; /* silently ignore and retry */ |
569 | else |
535 | else |
|
|
536 | { |
570 | ev_syserr ("(libev) linuxaio io_submit"); |
537 | ev_syserr ("(libev) linuxaio io_submit"); |
|
|
538 | res = 0; |
|
|
539 | } |
571 | |
540 | |
572 | submitted += res; |
541 | submitted += res; |
573 | } |
542 | } |
574 | |
543 | |
575 | linuxaio_submitcnt = 0; |
544 | linuxaio_submitcnt = 0; |
… | |
… | |
603 | ev_io_init (EV_A_ &linuxaio_epoll_w, linuxaio_epoll_cb, backend_fd, EV_READ); |
572 | ev_io_init (EV_A_ &linuxaio_epoll_w, linuxaio_epoll_cb, backend_fd, EV_READ); |
604 | ev_set_priority (&linuxaio_epoll_w, EV_MAXPRI); |
573 | ev_set_priority (&linuxaio_epoll_w, EV_MAXPRI); |
605 | ev_io_start (EV_A_ &linuxaio_epoll_w); |
574 | ev_io_start (EV_A_ &linuxaio_epoll_w); |
606 | ev_unref (EV_A); /* watcher should not keep loop alive */ |
575 | ev_unref (EV_A); /* watcher should not keep loop alive */ |
607 | |
576 | |
608 | backend_modify = linuxaio_modify; |
577 | backend_modify = linuxaio_modify; |
609 | backend_poll = linuxaio_poll; |
578 | backend_poll = linuxaio_poll; |
610 | |
579 | |
611 | linuxaio_iocbpmax = 0; |
580 | linuxaio_iocbpmax = 0; |
612 | linuxaio_iocbps = 0; |
581 | linuxaio_iocbps = 0; |
613 | |
582 | |
614 | linuxaio_submits = 0; |
583 | linuxaio_submits = 0; |
… | |
… | |
625 | epoll_destroy (EV_A); |
594 | epoll_destroy (EV_A); |
626 | linuxaio_free_iocbp (EV_A); |
595 | linuxaio_free_iocbp (EV_A); |
627 | evsys_io_destroy (linuxaio_ctx); /* fails in child, aio context is destroyed */ |
596 | evsys_io_destroy (linuxaio_ctx); /* fails in child, aio context is destroyed */ |
628 | } |
597 | } |
629 | |
598 | |
630 | inline_size |
599 | ecb_cold |
631 | void |
600 | static void |
632 | linuxaio_fork (EV_P) |
601 | linuxaio_fork (EV_P) |
633 | { |
602 | { |
634 | /* this frees all iocbs, which is very heavy-handed */ |
|
|
635 | linuxaio_destroy (EV_A); |
|
|
636 | linuxaio_submitcnt = 0; /* all pointers were invalidated */ |
603 | linuxaio_submitcnt = 0; /* all pointers were invalidated */ |
|
|
604 | linuxaio_free_iocbp (EV_A); /* this frees all iocbs, which is very heavy-handed */ |
|
|
605 | evsys_io_destroy (linuxaio_ctx); /* fails in child, aio context is destroyed */ |
637 | |
606 | |
638 | linuxaio_iteration = 0; /* we start over in the child */ |
607 | linuxaio_iteration = 0; /* we start over in the child */ |
639 | |
608 | |
640 | while (linuxaio_io_setup (EV_A) < 0) |
609 | while (linuxaio_io_setup (EV_A) < 0) |
641 | ev_syserr ("(libev) linuxaio io_setup"); |
610 | ev_syserr ("(libev) linuxaio io_setup"); |
642 | |
611 | |
643 | /* forking epoll should also effectively unregister all fds from the backend */ |
612 | /* forking epoll should also effectively unregister all fds from the backend */ |
644 | epoll_fork (EV_A); |
613 | epoll_fork (EV_A); |
|
|
614 | /* epoll_fork already did this. hopefully */ |
|
|
615 | /*fd_rearm_all (EV_A);*/ |
645 | |
616 | |
646 | ev_io_stop (EV_A_ &linuxaio_epoll_w); |
617 | ev_io_stop (EV_A_ &linuxaio_epoll_w); |
647 | ev_io_set (EV_A_ &linuxaio_epoll_w, backend_fd, EV_READ); |
618 | ev_io_set (EV_A_ &linuxaio_epoll_w, backend_fd, EV_READ); |
648 | ev_io_start (EV_A_ &linuxaio_epoll_w); |
619 | ev_io_start (EV_A_ &linuxaio_epoll_w); |
649 | |
|
|
650 | /* epoll_fork already did this. hopefully */ |
|
|
651 | /*fd_rearm_all (EV_A);*/ |
|
|
652 | } |
620 | } |
653 | |
621 | |